Why did the radical republicans feel that the 14th amendment was necessary?

The Civil Rights Act, passed on April 9, 1866, guaranteed citizenship to all people born in the United States, but the Radical Republicans wanted to ensure that citizenship for freedmen would be protected by the Constitution. ... This right would not be conferred until the passage of the 15th Amendment in 1870.

Um well north korea is a very harsh place because students go to school for 24 hours and almost never rest and the president is well i think sends to much bomb that’s what i think